| 1 | /* Test intprops.h.
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| 2 | Copyright (C) 2011-2022 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation, either version 3 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* Written by Paul Eggert. */
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| 18 |
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| 19 | /* Tell gcc not to warn about the long expressions that the overflow
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| 20 | macros expand to, or about the (X < 0) expressions. */
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| 21 | #if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
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| 22 | # pragma GCC diagnostic ignored "-Woverlength-strings"
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| 23 | # pragma GCC diagnostic ignored "-Wtype-limits"
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| 24 |
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| 25 | /* Work around a bug in GCC 6.1 and earlier; see:
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| 26 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68971 */
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| 27 | # pragma GCC diagnostic ignored "-Woverflow"
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| 28 |
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| 29 | #endif
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| 30 |
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| 31 | #include <config.h>
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| 32 |
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| 33 | #ifdef TEST_STDCKDINT
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| 34 | # include <stdckdint.h>
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| 35 | #else
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| 36 | # include "intprops.h"
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| 37 | #endif
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| 38 |
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| 39 | #include <inttypes.h>
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| 40 | #include <limits.h>
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| 41 |
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| 42 | #include "macros.h"
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| 43 |
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| 44 | /* Compile-time verification of expression X.
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| 45 | In this file, we need it as a statement, rather than as a declaration. */
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| 46 | #define verify_stmt(x) do { static_assert (x); } while (0)
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| 47 |
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| 48 | /* VERIFY (X) uses a static assertion for compilers that are known to work,
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| 49 | and falls back on a dynamic assertion for other compilers.
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| 50 | But it ignores X if testing stdckdint.h.
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| 51 | These tests should be checkable via 'verify' rather than 'ASSERT', but
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| 52 | using 'verify' would run into a bug with HP-UX 11.23 cc; see
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| 53 | <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00401.html>. */
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| 54 | #ifdef TEST_STDCKDINT
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| 55 | # define VERIFY(x) ((void) 0)
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| 56 | #elif __GNUC__ || __clang__ || __SUNPRO_C
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| 57 | # define VERIFY(x) verify_stmt (x)
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| 58 | #else
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| 59 | # define VERIFY(x) ASSERT (x)
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| 60 | #endif
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| 61 |
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| 62 | #define DONTCARE __LINE__
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| 63 |
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| 64 | int int_minus_2 = -2;
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| 65 | int int_1 = 1;
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| 66 |
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| 67 | int
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| 68 | main (void)
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| 69 | {
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| 70 | /* Use VERIFY for tests that must be integer constant expressions,
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| 71 | ASSERT otherwise. */
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| 72 |
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| 73 | #ifndef TEST_STDCKDINT
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| 74 | /* TYPE_IS_INTEGER. */
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| 75 | ASSERT (TYPE_IS_INTEGER (bool));
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| 76 | ASSERT (TYPE_IS_INTEGER (char));
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| 77 | ASSERT (TYPE_IS_INTEGER (signed char));
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| 78 | ASSERT (TYPE_IS_INTEGER (unsigned char));
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| 79 | ASSERT (TYPE_IS_INTEGER (short int));
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| 80 | ASSERT (TYPE_IS_INTEGER (unsigned short int));
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| 81 | ASSERT (TYPE_IS_INTEGER (int));
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| 82 | ASSERT (TYPE_IS_INTEGER (unsigned int));
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| 83 | ASSERT (TYPE_IS_INTEGER (long int));
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| 84 | ASSERT (TYPE_IS_INTEGER (unsigned long int));
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| 85 | ASSERT (TYPE_IS_INTEGER (intmax_t));
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| 86 | ASSERT (TYPE_IS_INTEGER (uintmax_t));
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| 87 | ASSERT (! TYPE_IS_INTEGER (float));
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| 88 | ASSERT (! TYPE_IS_INTEGER (double));
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| 89 | ASSERT (! TYPE_IS_INTEGER (long double));
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| 90 |
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| 91 | /* TYPE_SIGNED. */
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| 92 | /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
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| 93 | VERIFY (TYPE_SIGNED (signed char));
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| 94 | VERIFY (! TYPE_SIGNED (unsigned char));
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| 95 | VERIFY (TYPE_SIGNED (short int));
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| 96 | VERIFY (! TYPE_SIGNED (unsigned short int));
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| 97 | VERIFY (TYPE_SIGNED (int));
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| 98 | VERIFY (! TYPE_SIGNED (unsigned int));
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| 99 | VERIFY (TYPE_SIGNED (long int));
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| 100 | VERIFY (! TYPE_SIGNED (unsigned long int));
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| 101 | VERIFY (TYPE_SIGNED (intmax_t));
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| 102 | VERIFY (! TYPE_SIGNED (uintmax_t));
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| 103 | ASSERT (TYPE_SIGNED (float));
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| 104 | ASSERT (TYPE_SIGNED (double));
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| 105 | ASSERT (TYPE_SIGNED (long double));
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| 106 |
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| 107 | /* Integer representation. Check that it is two's complement. */
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| 108 | VERIFY (INT_MIN + INT_MAX < 0);
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| 109 |
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| 110 | /* TYPE_MINIMUM, TYPE_MAXIMUM. */
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| 111 | VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
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| 112 | VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
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| 113 | VERIFY (TYPE_MINIMUM (unsigned char) == 0);
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| 114 | VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
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| 115 | VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
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| 116 | VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
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| 117 | VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
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| 118 | VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
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| 119 | VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
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| 120 | VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
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| 121 | VERIFY (TYPE_MINIMUM (int) == INT_MIN);
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| 122 | VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
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| 123 | VERIFY (TYPE_MINIMUM (unsigned int) == 0);
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| 124 | VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
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| 125 | VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
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| 126 | VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
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| 127 | VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
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| 128 | VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
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| 129 | #ifdef LLONG_MAX
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| 130 | verify_stmt (TYPE_MINIMUM (long long int) == LLONG_MIN);
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| 131 | verify_stmt (TYPE_MAXIMUM (long long int) == LLONG_MAX);
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| 132 | verify_stmt (TYPE_MINIMUM (unsigned long long int) == 0);
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| 133 | verify_stmt (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
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| 134 | #endif
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| 135 | VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
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| 136 | VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
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| 137 | VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
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| 138 | VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
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| 139 |
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| 140 | /* TYPE_WIDTH. */
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| 141 | #ifdef CHAR_WIDTH
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| 142 | verify_stmt (TYPE_WIDTH (char) == CHAR_WIDTH);
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| 143 | verify_stmt (TYPE_WIDTH (signed char) == SCHAR_WIDTH);
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| 144 | verify_stmt (TYPE_WIDTH (unsigned char) == UCHAR_WIDTH);
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| 145 | verify_stmt (TYPE_WIDTH (short int) == SHRT_WIDTH);
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| 146 | verify_stmt (TYPE_WIDTH (unsigned short int) == USHRT_WIDTH);
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| 147 | verify_stmt (TYPE_WIDTH (int) == INT_WIDTH);
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| 148 | verify_stmt (TYPE_WIDTH (unsigned int) == UINT_WIDTH);
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| 149 | verify_stmt (TYPE_WIDTH (long int) == LONG_WIDTH);
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| 150 | verify_stmt (TYPE_WIDTH (unsigned long int) == ULONG_WIDTH);
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| 151 | #ifdef LLONG_WIDTH
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| 152 | verify_stmt (TYPE_WIDTH (long long int) == LLONG_WIDTH);
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| 153 | verify_stmt (TYPE_WIDTH (unsigned long long int) == ULLONG_WIDTH);
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| 154 | #endif
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| 155 | #endif
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| 156 |
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| 157 | /* INT_BITS_STRLEN_BOUND. */
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| 158 | VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
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| 159 | VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
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| 160 |
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| 161 | /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND. */
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| 162 | #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX. */
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| 163 | VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
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| 164 | VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
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| 165 | #endif
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| 166 | #ifdef INT64_MAX
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| 167 | VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
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| 168 | VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
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| 169 | #endif
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| 170 | #endif
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| 171 |
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| 172 | /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
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| 173 | INT_<op>_OVERFLOW tests, so define macros to do both. OP is the
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| 174 | operation, OPNAME its symbolic name, A and B its operands, T the
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| 175 | result type, V the overflow flag, and VRES the result if V and if
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| 176 | two's complement. CHECK_BINOP is for most binary operatinos,
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| 177 | CHECK_SBINOP for binary +, -, * when the result type is signed,
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| 178 | and CHECK_UNOP for unary operations. */
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| 179 | #define CHECK_BINOP(op, opname, a, b, t, v, vres) \
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| 180 | VERIFY (INT_##opname##_RANGE_OVERFLOW (a, b, TYPE_MINIMUM (t), \
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| 181 | TYPE_MAXIMUM (t)) \
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| 182 | == (v)); \
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| 183 | VERIFY (INT_##opname##_OVERFLOW (a, b) == (v))
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| 184 | #define CHECK_SBINOP(op, opname, a, b, t, v, vres) \
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| 185 | CHECK_BINOP(op, opname, a, b, t, v, vres); \
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| 186 | { \
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| 187 | t result; \
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| 188 | ASSERT (INT_##opname##_WRAPV (a, b, &result) == (v)); \
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| 189 | ASSERT (result == ((v) ? (vres) : ((a) op (b)))); \
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| 190 | }
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| 191 | #define CHECK_UNOP(op, opname, a, t, v) \
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| 192 | VERIFY (INT_##opname##_RANGE_OVERFLOW (a, TYPE_MINIMUM (t), \
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| 193 | TYPE_MAXIMUM (t)) \
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| 194 | == (v)); \
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| 195 | VERIFY (INT_##opname##_OVERFLOW (a) == (v))
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| 196 |
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| 197 | /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW. */
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| 198 | VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
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| 199 | VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
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| 200 |
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| 201 | CHECK_SBINOP (+, ADD, INT_MAX, 1, int, true, INT_MIN);
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| 202 | CHECK_SBINOP (+, ADD, INT_MAX, -1, int, false, INT_MAX - 1);
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| 203 | CHECK_SBINOP (+, ADD, INT_MIN, 1, int, false, INT_MIN + 1);
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| 204 | CHECK_SBINOP (+, ADD, INT_MIN, -1, int, true, INT_MAX);
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| 205 | CHECK_BINOP (+, ADD, UINT_MAX, 1u, unsigned int, true, 0u);
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| 206 | CHECK_BINOP (+, ADD, 0u, 1u, unsigned int, false, 1u);
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| 207 |
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| 208 | CHECK_SBINOP (-, SUBTRACT, INT_MAX, 1, int, false, INT_MAX - 1);
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| 209 | CHECK_SBINOP (-, SUBTRACT, INT_MAX, -1, int, true, INT_MIN);
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| 210 | CHECK_SBINOP (-, SUBTRACT, INT_MIN, 1, int, true, INT_MAX);
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| 211 | CHECK_SBINOP (-, SUBTRACT, INT_MIN, -1, int, false, INT_MIN - -1);
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| 212 | CHECK_BINOP (-, SUBTRACT, UINT_MAX, 1u, unsigned int, false, UINT_MAX - 1u);
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| 213 | CHECK_BINOP (-, SUBTRACT, 0u, 1u, unsigned int, true, 0u - 1u);
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| 214 |
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| 215 | CHECK_UNOP (-, NEGATE, INT_MIN, int, true);
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| 216 | CHECK_UNOP (-, NEGATE, 0, int, false);
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| 217 | CHECK_UNOP (-, NEGATE, INT_MAX, int, false);
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| 218 | CHECK_UNOP (-, NEGATE, 0u, unsigned int, false);
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| 219 | CHECK_UNOP (-, NEGATE, 1u, unsigned int, true);
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| 220 | CHECK_UNOP (-, NEGATE, UINT_MAX, unsigned int, true);
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| 221 |
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| 222 | CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MAX, int, true, 1);
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| 223 | CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MIN, int, true, INT_MIN);
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| 224 | CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MAX, int, true, INT_MIN);
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| 225 | CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MIN, int, true, 0);
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| 226 | CHECK_SBINOP (*, MULTIPLY, -1, INT_MIN, int,
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| 227 | INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
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| 228 | #if !defined __HP_cc
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| 229 | CHECK_SBINOP (*, MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
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| 230 | long int, false, LONG_MIN - LONG_MIN % INT_MAX);
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| 231 | #endif
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| 232 |
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| 233 | CHECK_BINOP (/, DIVIDE, INT_MIN, -1, int,
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| 234 | INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
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| 235 | CHECK_BINOP (/, DIVIDE, INT_MAX, 1, int, false, INT_MAX);
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| 236 | CHECK_BINOP (/, DIVIDE, (unsigned int) INT_MIN, -1u, unsigned int,
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| 237 | false, INT_MIN / -1u);
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| 238 |
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| 239 | CHECK_BINOP (%, REMAINDER, INT_MIN, -1, int, INT_NEGATE_OVERFLOW (INT_MIN), 0);
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| 240 | CHECK_BINOP (%, REMAINDER, INT_MAX, 1, int, false, 0);
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| 241 | CHECK_BINOP (%, REMAINDER, (unsigned int) INT_MIN, -1u, unsigned int,
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| 242 | false, INT_MIN % -1u);
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| 243 |
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| 244 | CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX, 1, unsigned int, true, UINT_MAX << 1);
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| 245 | CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2 + 1, 1, unsigned int, true,
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| 246 | (UINT_MAX / 2 + 1) << 1);
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| 247 | CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2, 1, unsigned int, false,
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| 248 | (UINT_MAX / 2) << 1);
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| 249 |
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| 250 | /* INT_<op>_OVERFLOW and INT_<op>_WRAPV with mixed types. */
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| 251 | #define CHECK_SUM(a, b, t, v, vres) \
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| 252 | CHECK_SUM1 (a, b, t, v, vres); \
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| 253 | CHECK_SUM1 (b, a, t, v, vres)
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| 254 | #define CHECK_SUM_WRAPV(a, b, t, v, vres, okres) \
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| 255 | CHECK_SUM_WRAPV1 (a, b, t, v, vres, okres); \
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| 256 | CHECK_SUM_WRAPV1 (b, a, t, v, vres, okres)
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| 257 | #define CHECK_SUM1(a, b, t, v, vres) \
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| 258 | VERIFY (INT_ADD_OVERFLOW (a, b) == (v)); \
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| 259 | CHECK_SUM_WRAPV1 (a, b, t, v, vres, (a) + (b))
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| 260 | #define CHECK_SUM_WRAPV1(a, b, t, v, vres, okres) \
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| 261 | { \
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| 262 | t result; \
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| 263 | ASSERT (INT_ADD_WRAPV (a, b, &result) == (v)); \
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| 264 | ASSERT (result == ((v) ? (vres) : (okres))); \
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| 265 | }
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| 266 | CHECK_SUM (-1, LONG_MIN, long int, true, LONG_MAX);
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| 267 | CHECK_SUM (-1, UINT_MAX, unsigned int, false, DONTCARE);
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| 268 | CHECK_SUM (-1L, INT_MIN, long int, INT_MIN == LONG_MIN,
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| 269 | INT_MIN == LONG_MIN ? INT_MAX : DONTCARE);
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| 270 | CHECK_SUM (0u, -1, unsigned int, true, 0u + -1);
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| 271 | CHECK_SUM (0u, 0, unsigned int, false, DONTCARE);
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| 272 | CHECK_SUM (0u, 1, unsigned int, false, DONTCARE);
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| 273 | CHECK_SUM (1, LONG_MAX, long int, true, LONG_MIN);
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| 274 | CHECK_SUM (1, UINT_MAX, unsigned int, true, 0u);
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| 275 | CHECK_SUM (1L, INT_MAX, long int, INT_MAX == LONG_MAX,
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| 276 | INT_MAX == LONG_MAX ? INT_MIN : DONTCARE);
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| 277 | CHECK_SUM (1u, INT_MAX, unsigned int, INT_MAX == UINT_MAX, 1u + INT_MAX);
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| 278 | CHECK_SUM (1u, INT_MIN, unsigned int, true, 1u + INT_MIN);
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| 279 | CHECK_SUM_WRAPV (-1, 1u, int, false, DONTCARE, 0);
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| 280 | CHECK_SUM_WRAPV (-1, 1ul, int, false, DONTCARE, 0);
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| 281 | CHECK_SUM_WRAPV (-1l, 1u, int, false, DONTCARE, 0);
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| 282 | CHECK_SUM_WRAPV (-100, 1000u, int, false, DONTCARE, 900);
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| 283 | CHECK_SUM_WRAPV (INT_MIN, UINT_MAX, int, false, DONTCARE, INT_MAX);
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| 284 | CHECK_SUM_WRAPV (1u, INT_MAX, int, true, INT_MIN, DONTCARE);
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| 285 | CHECK_SUM_WRAPV (INT_MAX, 1, long int, LONG_MAX <= INT_MAX, INT_MIN,
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| 286 | INT_MAX + 1L);
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| 287 | CHECK_SUM_WRAPV (UINT_MAX, 1, long int, LONG_MAX <= UINT_MAX, 0,
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| 288 | UINT_MAX + 1L);
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| 289 | CHECK_SUM_WRAPV (INT_MAX, 1, unsigned long int, ULONG_MAX <= INT_MAX, 0,
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| 290 | INT_MAX + 1uL);
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| 291 | CHECK_SUM_WRAPV (UINT_MAX, 1, unsigned long int, ULONG_MAX <= UINT_MAX, 0,
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| 292 | UINT_MAX + 1uL);
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| 293 |
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| 294 | {
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| 295 | long int result;
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| 296 | ASSERT (INT_ADD_WRAPV (1, INT_MAX, &result) == (INT_MAX == LONG_MAX));
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| 297 | ASSERT (INT_ADD_WRAPV (-1, INT_MIN, &result) == (INT_MIN == LONG_MIN));
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| 298 | }
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| 299 |
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| 300 | #define CHECK_DIFFERENCE(a, b, t, v, vres) \
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| 301 | VERIFY (INT_SUBTRACT_OVERFLOW (a, b) == (v))
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| 302 | #define CHECK_SDIFFERENCE(a, b, t, v, vres) \
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| 303 | CHECK_DIFFERENCE (a, b, t, v, vres); \
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| 304 | CHECK_SDIFFERENCE_WRAPV (a, b, t, v, vres)
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| 305 | #define CHECK_SDIFFERENCE_WRAPV(a, b, t, v, vres) \
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| 306 | { \
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| 307 | t result; \
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| 308 | ASSERT (INT_SUBTRACT_WRAPV (a, b, &result) == (v)); \
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| 309 | ASSERT (result == ((v) ? (vres) : ((a) - (b)))); \
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| 310 | }
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| 311 | CHECK_DIFFERENCE (INT_MAX, 1u, unsigned int, UINT_MAX < INT_MAX - 1,
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| 312 | INT_MAX - 1u);
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| 313 | CHECK_DIFFERENCE (UINT_MAX, 1, unsigned int, false, UINT_MAX - 1);
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| 314 | CHECK_DIFFERENCE (0u, -1, unsigned int, false, 0u - -1);
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| 315 | CHECK_DIFFERENCE (UINT_MAX, -1, unsigned int, true, UINT_MAX - -1);
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| 316 | CHECK_DIFFERENCE (INT_MIN, 1u, unsigned int, true, INT_MIN - 1u);
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| 317 | CHECK_DIFFERENCE (-1, 0u, unsigned int, true, -1 - 0u);
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| 318 | CHECK_SDIFFERENCE (-1, INT_MIN, int, false, -1 - INT_MIN);
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| 319 | CHECK_SDIFFERENCE (-1, INT_MAX, int, false, -1 - INT_MAX);
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| 320 | CHECK_SDIFFERENCE (0, INT_MIN, int, INT_MIN < -INT_MAX, INT_MIN);
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| 321 | CHECK_SDIFFERENCE (0, INT_MAX, int, false, 0 - INT_MAX);
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| 322 | CHECK_SDIFFERENCE_WRAPV (-1, 1u, int, false, DONTCARE);
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| 323 | CHECK_SDIFFERENCE_WRAPV (-1, 1ul, int, false, DONTCARE);
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| 324 | CHECK_SDIFFERENCE_WRAPV (-1l, 1u, int, false, DONTCARE);
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| 325 | CHECK_SDIFFERENCE_WRAPV (0u, INT_MAX, int, false, DONTCARE);
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| 326 | CHECK_SDIFFERENCE_WRAPV (1u, INT_MIN, int, true, 1u - INT_MIN);
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| 327 | {
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| 328 | long int result;
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| 329 | ASSERT (INT_SUBTRACT_WRAPV (INT_MAX, -1, &result) == (INT_MAX == LONG_MAX));
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| 330 | ASSERT (INT_SUBTRACT_WRAPV (INT_MIN, 1, &result) == (INT_MAX == LONG_MAX));
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| 331 | }
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| 332 |
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| 333 | #define CHECK_PRODUCT(a, b, t, v, vres) \
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| 334 | CHECK_PRODUCT1 (a, b, t, v, vres); \
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| 335 | CHECK_PRODUCT1 (b, a, t, v, vres)
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| 336 | #define CHECK_SPRODUCT(a, b, t, v, vres) \
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| 337 | CHECK_SPRODUCT1 (a, b, t, v, vres); \
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| 338 | CHECK_SPRODUCT1 (b, a, t, v, vres)
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| 339 | #define CHECK_SPRODUCT_WRAPV(a, b, t, v, vres) \
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| 340 | CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres); \
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| 341 | CHECK_SPRODUCT_WRAPV1 (b, a, t, v, vres)
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| 342 | #define CHECK_PRODUCT1(a, b, t, v, vres) \
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| 343 | VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (v))
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| 344 | #define CHECK_SPRODUCT1(a, b, t, v, vres) \
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| 345 | CHECK_PRODUCT1 (a, b, t, v, vres); \
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| 346 | CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres)
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| 347 | #define CHECK_SPRODUCT_WRAPV1(a, b, t, v, vres) \
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| 348 | { \
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| 349 | t result; \
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| 350 | ASSERT (INT_MULTIPLY_WRAPV (a, b, &result) == (v)); \
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| 351 | ASSERT (result == ((v) ? (vres) : ((a) * (b)))); \
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| 352 | }
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| 353 | CHECK_PRODUCT (-1, 1u, unsigned int, true, -1 * 1u);
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| 354 | CHECK_SPRODUCT (-1, INT_MIN, int, INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
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| 355 | CHECK_PRODUCT (-1, UINT_MAX, unsigned int, true, -1 * UINT_MAX);
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|---|
| 356 | CHECK_SPRODUCT (-32768, LONG_MAX / -32768 - 1, long int, true, LONG_MIN);
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|---|
| 357 | CHECK_SPRODUCT (-12345, LONG_MAX / -12345, long int, false, DONTCARE);
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|---|
| 358 | CHECK_SPRODUCT (0, -1, int, false, DONTCARE);
|
|---|
| 359 | CHECK_SPRODUCT (0, 0, int, false, DONTCARE);
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|---|
| 360 | CHECK_PRODUCT (0, 0u, unsigned int, false, DONTCARE);
|
|---|
| 361 | CHECK_SPRODUCT (0, 1, int, false, DONTCARE);
|
|---|
| 362 | CHECK_SPRODUCT (0, INT_MAX, int, false, DONTCARE);
|
|---|
| 363 | CHECK_SPRODUCT (0, INT_MIN, int, false, DONTCARE);
|
|---|
| 364 | CHECK_PRODUCT (0, UINT_MAX, unsigned int, false, DONTCARE);
|
|---|
| 365 | CHECK_PRODUCT (0u, -1, unsigned int, false, DONTCARE);
|
|---|
| 366 | CHECK_PRODUCT (0u, 0, unsigned int, false, DONTCARE);
|
|---|
| 367 | CHECK_PRODUCT (0u, 0u, unsigned int, false, DONTCARE);
|
|---|
| 368 | CHECK_PRODUCT (0u, 1, unsigned int, false, DONTCARE);
|
|---|
| 369 | CHECK_PRODUCT (0u, INT_MAX, unsigned int, false, DONTCARE);
|
|---|
| 370 | CHECK_PRODUCT (0u, INT_MIN, unsigned int, false, DONTCARE);
|
|---|
| 371 | CHECK_PRODUCT (0u, UINT_MAX, unsigned int, false, DONTCARE);
|
|---|
| 372 | CHECK_SPRODUCT (1, INT_MAX, int, false, DONTCARE);
|
|---|
| 373 | CHECK_SPRODUCT (1, INT_MIN, int, false, DONTCARE);
|
|---|
| 374 | CHECK_PRODUCT (1, UINT_MAX, unsigned int, false, DONTCARE);
|
|---|
| 375 | CHECK_PRODUCT (1u, INT_MIN, unsigned int, true, 1u * INT_MIN);
|
|---|
| 376 | CHECK_PRODUCT (1u, INT_MAX, unsigned int, UINT_MAX < INT_MAX, 1u * INT_MAX);
|
|---|
| 377 | CHECK_PRODUCT (INT_MAX, UINT_MAX, unsigned int, true, INT_MAX * UINT_MAX);
|
|---|
| 378 | CHECK_PRODUCT (INT_MAX, ULONG_MAX, unsigned long int, true,
|
|---|
| 379 | INT_MAX * ULONG_MAX);
|
|---|
| 380 | #if !defined __HP_cc
|
|---|
| 381 | CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, long int, true, LONG_MIN);
|
|---|
| 382 | CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN, long int, false, DONTCARE);
|
|---|
| 383 | #endif
|
|---|
| 384 | CHECK_PRODUCT (INT_MIN, UINT_MAX, unsigned int, true, INT_MIN * UINT_MAX);
|
|---|
| 385 | CHECK_PRODUCT (INT_MIN, ULONG_MAX, unsigned long int, true,
|
|---|
| 386 | INT_MIN * ULONG_MAX);
|
|---|
| 387 | CHECK_SPRODUCT_WRAPV (-1, INT_MAX + 1u, int, false, DONTCARE);
|
|---|
| 388 | CHECK_SPRODUCT_WRAPV (-1, 1u, int, false, DONTCARE);
|
|---|
| 389 | CHECK_SPRODUCT (0, ULONG_MAX, int, false, DONTCARE);
|
|---|
| 390 | CHECK_SPRODUCT (0u, LONG_MIN, int, false, DONTCARE);
|
|---|
| 391 | {
|
|---|
| 392 | long int result;
|
|---|
| 393 | ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
|
|---|
| 394 | == (LONG_MAX / INT_MAX < INT_MAX));
|
|---|
| 395 | ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
|
|---|
| 396 | || result == INT_MAX * (long int) INT_MAX);
|
|---|
| 397 | ASSERT (INT_MULTIPLY_WRAPV (INT_MIN, INT_MIN, &result)
|
|---|
| 398 | || result == INT_MIN * (long int) INT_MIN);
|
|---|
| 399 | }
|
|---|
| 400 |
|
|---|
| 401 | # ifdef LLONG_MAX
|
|---|
| 402 | {
|
|---|
| 403 | long long int result;
|
|---|
| 404 | ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
|
|---|
| 405 | == (LLONG_MAX / LONG_MAX < LONG_MAX));
|
|---|
| 406 | ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
|
|---|
| 407 | || result == LONG_MAX * (long long int) LONG_MAX);
|
|---|
| 408 | ASSERT (INT_MULTIPLY_WRAPV (LONG_MIN, LONG_MIN, &result)
|
|---|
| 409 | || result == LONG_MIN * (long long int) LONG_MIN);
|
|---|
| 410 | }
|
|---|
| 411 | # endif
|
|---|
| 412 |
|
|---|
| 413 | /* Check for GCC bug 91450. */
|
|---|
| 414 | {
|
|---|
| 415 | unsigned long long result;
|
|---|
| 416 | ASSERT (INT_MULTIPLY_WRAPV (int_minus_2, int_1, &result) && result == -2);
|
|---|
| 417 | }
|
|---|
| 418 |
|
|---|
| 419 | #define CHECK_QUOTIENT(a, b, v) VERIFY (INT_DIVIDE_OVERFLOW (a, b) == (v))
|
|---|
| 420 |
|
|---|
| 421 | CHECK_QUOTIENT (INT_MIN, -1L, INT_MIN == LONG_MIN);
|
|---|
| 422 | CHECK_QUOTIENT (INT_MIN, UINT_MAX, false);
|
|---|
| 423 | CHECK_QUOTIENT (INTMAX_MIN, UINTMAX_MAX, false);
|
|---|
| 424 | CHECK_QUOTIENT (INTMAX_MIN, UINT_MAX, false);
|
|---|
| 425 | CHECK_QUOTIENT (-11, 10u, true);
|
|---|
| 426 | CHECK_QUOTIENT (-10, 10u, true);
|
|---|
| 427 | CHECK_QUOTIENT (-9, 10u, false);
|
|---|
| 428 | CHECK_QUOTIENT (11u, -10, true);
|
|---|
| 429 | CHECK_QUOTIENT (10u, -10, true);
|
|---|
| 430 | CHECK_QUOTIENT (9u, -10, false);
|
|---|
| 431 |
|
|---|
| 432 | #define CHECK_REMAINDER(a, b, v) VERIFY (INT_REMAINDER_OVERFLOW (a, b) == (v))
|
|---|
| 433 |
|
|---|
| 434 | CHECK_REMAINDER (INT_MIN, -1L, INT_MIN == LONG_MIN);
|
|---|
| 435 | CHECK_REMAINDER (-1, UINT_MAX, true);
|
|---|
| 436 | CHECK_REMAINDER ((intmax_t) -1, UINTMAX_MAX, true);
|
|---|
| 437 | CHECK_REMAINDER (INTMAX_MIN, UINT_MAX,
|
|---|
| 438 | (INTMAX_MAX < UINT_MAX
|
|---|
| 439 | && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
|
|---|
| 440 | CHECK_REMAINDER (INT_MIN, ULONG_MAX, INT_MIN % ULONG_MAX != 1);
|
|---|
| 441 | CHECK_REMAINDER (1u, -1, false);
|
|---|
| 442 | CHECK_REMAINDER (37*39u, -39, false);
|
|---|
| 443 | CHECK_REMAINDER (37*39u + 1, -39, true);
|
|---|
| 444 | CHECK_REMAINDER (37*39u - 1, -39, true);
|
|---|
| 445 | CHECK_REMAINDER (LONG_MAX, -INT_MAX, false);
|
|---|
| 446 |
|
|---|
| 447 | return 0;
|
|---|
| 448 | }
|
|---|
